CONTENTS. 



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SEEIES B. VOL. XC. 



No. B 623.— October 1, 1917. 



PAOE 



Observations and Experiments on the Susceptibility and Immunity of Rats 

 towards Jensen's Rat Sarcoma. By J. C. Mottram, M.B. (Lond.), and Sidney 

 Russ, D.Sc. (Lond.), Cancer Research Laboratories, Middlesex Hospital. Com- 

 municated by Prof. H. G. Plimmer, F.R.S. (Plates 1 and 2) 1 



The Germicidal Action of Ultra- Violet Radiation, and its Correlation with 

 Selective Absorption. By C. H. Browning, M.D., D.P.H., Director of the 

 Bland-Sutton Institute of Pathology, Middlesex Hospital, and Sidney 

 Russ, D.Sc, Physicist to the Middlesex Hospital. Communicated by Prof. 

 A. W. Porter, F.R.S. (Plate 3) 33 



The Isolation from Peat of Certain Nucleic Acid Derivatives. By W. B. 

 Bottomley, M.A., Professor of Botany, University of London, King's College. 

 Communicated by F. W. Oliver, F.R.S 39 



No. B 624.— December 1, 1917. 



The Distribution in Wheat, Rice, and Maize Grains of the Substance, the 

 Deficiency of which in a Diet causes Polyneuritis in Birds and Beri-beri in 

 Man. By Harriette Chick and E. Margaret Hume. Communicated by Dr. C. J. 

 Martin, F.R.S 44 



The Effect of Exposure to Temperatures at or above 100' C. upon the Substance 

 (Vitamine) whose Deficiency in a Diet causes Polyneuritis in Birds and 

 Beri-berii in Man. By Harriette Chick and E. Margaret Hume. Com- 

 municated by Dr. C. J. Martin, F.R.S 60 



Two Cases of Congenital Night-Blindness. By Sir W. de W. Abney, K.C.B., 



F.R.S 69 



No. B 62.5.— January 1, 1918. 



The Enzymes Concerned in the Decomposition of Glucose and Mannitol by 

 Bacillus coll communis. Part II. — Experiments of Short Duration with 

 an Emulsion of the Organisms. By Egerton Charles Grey (Beit Memorial 

 Research Fellow). Communicated by Dr. A. Harden, F.R.S 75 



